3220019981 has 4 divisors (see below), whose sum is σ = 3223296672. Its totient is φ = 3216743292.

The previous prime is 3220019969. The next prime is 3220019983. The reversal of 3220019981 is 1899100223.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1899100223 = 4463 ⋅425521.

It is a cyclic number.

It is not a de Polignac number, because 3220019981 - 2¹⁴ = 3220003597 is a prime.

It is a super-2 number, since 2×3220019981² = 20737057356078480722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3220019983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1636871 + ... + 1638836.

It is an arithmetic number, because the mean of its divisors is an integer number (805824168).

Almost surely, 2^3220019981 is an apocalyptic number.

It is an amenable number.

3220019981 is a deficient number, since it is larger than the sum of its proper divisors (3276691).

3220019981 is an equidigital number, since it uses as much as digits as its factorization.

3220019981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3276690.

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 3220019981 is about 56745.2198956000. The cubic root of 3220019981 is about 1476.6793063228.

The spelling of 3220019981 in words is "three billion, two hundred twenty million, nineteen thousand, nine hundred eighty-one".